"The world we see that seems so insane is the result of a belief system that is not working. To perceive the world differently, we must be willing to change our belief system, let the past slip away, expand our sense of now, and dissolve the fear in our minds."

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If you raise your standards but don't really believe you can meet them, you've already sabotaged yourself. You won't even try; you'll be lacking the sense of certainty that allows you to tap the deepest capacity that's within you... Our beliefs are like unquestioned commands, telling us how things are, what's possible and impossible and what we can and can not do. They shape every action, every thought and every feeling that we experience. As a result, changing our belief systems is central to making any real and lasting change in our lives.

— Tony Robbins